providers/import: Add execute function that returns ExecutionResult

providers/import/import.go

@@ -22,6 +22,7 @@ func (this *Provider) FuncMapFor (document *step.Document) template.FuncMap {
 		document: document,
 	}
 	return template.FuncMap {
+		"execute":     stat.funcExecute,
 		"include":     stat.funcInclude,
 		"includeHTML": stat.funcIncludeHTML,
 	}
@@ -31,16 +32,28 @@ type state struct {
 	document *step.Document
 }
 
-func (this *state) funcInclude (name string, data any) (string, error) {
+func (this *state) funcExecute (name string, data any) (step.ExecutionResult, error) {
 	document, err := this.document.Environment().Parse(name)
-	if err != nil { return "", err }
+	if err != nil { return step.ExecutionResult { }, err }
 	builder := strings.Builder { }
 	err = document.Execute(&builder, step.ExecutionData { Data: data })
-	if err != nil { return "", err }
-	return builder.String(), nil
+	if err != nil { return step.ExecutionResult { }, err }
+	return step.ExecutionResult {
+		Author:      document.Author,
+		Title:       document.Title,
+		Extends:     document.Extends,
+		FrontMatter: document.FrontMatter,
+		Body:        template.HTML(builder.String()),
+	}, nil
+}
+
+func (this *state) funcInclude (name string, data any) (string, error) {
+	result, err := this.funcIncludeHTML(name, data)
+	return string(result), err
 }
 
 func (this *state) funcIncludeHTML (name string, data any) (template.HTML, error) {
-	result, err := this.funcInclude(name, data)
-	return template.HTML(result), err
+	result, err := this.funcExecute(name, data)
+	if err != nil { return "", err }
+	return result.Body, nil
 }